棉蚜在塑料大棚和日光温室青椒上的分布规律

为了明确棉蚜在塑料大棚和日光温室青椒上的分布规律,运用聚集度指标和Taylor幂方法,对塑料大棚和日光温室2种设施青椒植株上的棉蚜分布情况进行了分析。结果表明:在塑料大棚和日光温室青椒上,棉蚜的空间分布型均为聚集分布,聚集程度随密度升高而增大。棉蚜种群在青椒上的垂直分布规律为上部叶片分布最多,占整个青椒植株虫量的比例达到50%以上;中部次之,下部叶片棉蚜数量最少,但二者差异不显著。

The Spatial Distribution of Aphis gossypii (Glover) on Green Peppers in Plastic Greenhouse and Sunlight Greenhouse

In order to explore the distribution of A phis gossypii (Glover) on green peppers in the plastic greenhouse and sunlight greenhouse,aggregation intensity index and power law of Taylor were used to test the spatial distribution pattern of A phis gossypii (Glover) on green peppers in the two kinds of facilities. The results showed that the A phis gossypii (Glover) on green peppers in the plastic greenhouse and sunlight greenhouse belonged to the spatial pattern of aggregative distribution, and the degree of aggregation increased with the density. Analysis of vertical distribution showed that the A phis gossypii (Glover) mostly were feeding on the upper leaves of green peppers, the ratio accounted for more than 50%, population less on the middle leaves, and lowest on the bottom leaves, no significant difference between middle leaves and bottom leaves.